Improvement in milk-strainers



W. H. JOHNSON.

Improvement in Milk Strainers.

Patenfce-dJ-an.30,1872.

Inve vto'r Witnesses 9 I M: murmur/lacuna: :0 -11 tissue/1:3- P1502582) UNITED r @rrron.

WILLIAM H. JOHNSON, OF DELHI, NEW YORK.

IMPROVEMENT IN MILK-STRAINERS.

Specification forming part or Letters Patent No. 123,261, dated January 30, 1872.

SPECIFICATION. To all whom it may concern:

Be it known that I, WILLIAM H. J oHNsoN, of the town of Delhi, in the county of Delaware and State of New York, have invented a new and useful Strainer Appliance, which can be attached to or detached from pails and other vessels at pleasure, for the purpose of facilitating the straining or filtering of milk and other liquids, and also to facilitate the cleaning of the strainer after use; and I do hereby declare the following to be a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing making a part of this specification and to the letters of reference marked thereon, in which- Figure l is a perspective view of my strainer appliance attached to a pail. Fig. 2 is a perspective view of the strainer-trough. Fig. 3 is a front view of the strainer-frame with strainer attached. Fig. 4 is a longitudinal sectional elevation of the strainer-trough applied to a pail,-intended to show the method of attachment and position of the strainer appliance on the pail, and the use of the back flange or closing band B to prevent the leakage of the liquid at the back of the strainer-trough during the process of filtration. Fig. 5 is a longi tudinal sectional elevation of the strainertrough, showing the bottom of the trough constructed in such a manner as to allow all the liquid to escape over the bottom of the strainer-frame when the pail or other vessel is placed upright, after pouring the liquid through the strainer. Fi 6 is a longitudinal sectional elevation of the strainer-trough, showing the use or em ployment of a false bottom to accomplish the same object or result.

Like letters of reference indicate like parts.

A, Fig. 2, represents the trough or spout in which the strainerframe and strainer are placed. The back or rear end ofthetrougl1,which comes in contact with the pail or other vessel to which it is applied, is provided with a closing band or flange, B, which, together with the end of the trough, of which it forms a part, is made to correspond and lit close to the outside of the vessel to which the strainertrough is applied. The object or use of this closing band at the back end of the strainer-trough is to prevent the back leakage of any liquid while the same is passing through the strainer during the process of straining or filtering, as also to prevent the back leakage of any liquid remaining in the trough behind the strainerframe when the vessel to which the strainertrough is attached is placed in an upright position, after the straining process has been completed. To acconlplish this result, the bottom of the trough must be placed at such a distance from the top edge of the back flange or closing band B as to form, in combination with said closing band, a receptacle behind the strainer of sufficient depth to allow the easy escape of the liquid through the strainer over the bottom of the strainer-frame, without any of it escaping over the top of the closing band B, during the process of filtering, as shown in Fig. 4. The bottom of the strainer-trough should be so constructed as to decline longitn din all ysli ghtl y--to\vard the front or lip, on purpose to facilitate theescape ot' the liquid during the process of staining, which escape may be still further facilitated by constructing the bottom of the trough similar to the longitudinal section shown in Fig. 5; or a false bottom may be placed behind the strainer to accomplish the same result, as shown in Fig. 6. The cross-section of the strainer-trough may either be rectilinear or curvilinear, or a combination of both, care only being taken that the bottom of the trough or spout A shall be at a sufficient distance from the top edge of the closing band B to form, in combination with said band, a receptacle behind the strainer sufiiciently large to prevent back leakage. The sides of the trough above the closing band should be prolonged, as shown at 0, Figs. 1 and 2, on purpose to aid in supporting the strainertrough in its proper position on the vessel to which it is applied, as also to prevent the top edge of the closing band from being placed at too great a distance from the top edge of the vessel; and when intended for use on avessel having a wired rim, such as a tin pail, should also be cut out, as shown at b, Fig. 2, so as to allow the top of the closing band B to fit close against the body of the vessel, as shown in Fig. 4. The strainer-frame (3, Fig. 3, to which the wire-gauze or strainer D is attached, may either be secured fast to the strainer-trough or made to slip into a groove formed in the trough, as shown at 0, Figs. 2 and 4; or guide-clips (1, Figs. 1 and 2, may be soldered or otherwise secured to the sides of the trough, into which the strainer-frame G can be placed or removed at pleasure. The ability to remove the strainer from the trough or spout is in many cases very desirable, as the strainer can be cleaned more eft'ectuall y and easily, and strainers of different degrees of permeability can be used with the same trough to suit the consistency of any liquid it may be desired to strain. Then a detachable strainer is used, the strainer-trough should be provided with a cross-bar, E, Figs. 2 and 4, to prevent the sides of the trough from spreading apart from or closing in on the straine'rframe. This crossbar should be placed immediately behind the strainer, in which po sition it tends to prevent the liquid from escaping over the top of the strainer-frame during the process of filtration. The strainer should be placed in the strainer-trough sufficiently distant from the closing band B to form, in combination therewith and the said strainer-trough, a receptacle behind said strainer of sufficient capacity to receive and permit the escape of the liquid through the strainer without danger of back leakage. The position shown in Fig. 4 is found in practice to give very good results. The strainer-trough is attached and held close to the pail P, or other vessel to which it is applied, by means of springs or spring-clamps 0, Figs. 1, 2, and 4., of sufficient strength to hold the trough firmly in position on the vessel when in use, yet permit of its being easily detached therefrom when desired. The proper position of the strainertrough upon the vessel when applied for use is shown in Figs. 1 and 4, the top of the back or closing band B of the strainer-trough being just below the outside top edge or rim of the vessel to which the strainer-trough is applied.

The mode or method of operation is as follows: The strainer-trough with the strainer attached is applied to the top of the pail. l, or other vessel, as shown in Figs. 1 and 4, and, the liquid being poured gently out of the pail or other vessel into the trough behind the strainer, passes through the strainer and out of the trough, the back or closing band B meanwhile preventing the liquid from escaping at the back of the receiving-chamber.

I do not broadly claim as my invention the use of a straining appliance capable of being detached at pleasure from the vessel on or in which it is employed.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The appliable strainer-trough A, provided with a back or closing band B, when constructed and operating substantially as and for the purposes above specified.

2. The removable strainer-frame G, groove 0, guide-clips d, and cross-bar E, in combination with the appliable strainer-trough A, the whole being constructed, arranged, and operating substantially as and for the purposes above specified.

8. The employment of a receptacle or receiving-chamber behind the strainer, when constructed and operating substantially as and for the purposes above specified.

WM. H. JOHNSON.

Witnesses:

O. A. FooTE, J AMES K. PENFIELD. 

